A federal employee union representing more than 16,000 workers on Wednesday became the first such group to endorse Donald Trump for president, breaking from both its own tradition and the support offered by its parent organization.

The National Border Patrol Council gave Trump its first-ever endorsement of a presidential candidate, saying the controversial frontrunner has shown the leadership the country needs by shunning political correctness and making border security a centerpiece of his campaign. NBPC is a subsidiary of the American Federation of Government Employees, which in December endorsed Hillary Clinton in her bid for the White House.

The council represents all agents in the Border Patrol. Trump has repeatedly referred to the current Southern border as porous like “Swiss cheese,” while famously calling for a wall between the United States and Mexico. In his immigration plan, Trump has said he would triple the number of employees at Immigration and Customs Enforcement, also a component of the Homeland Security Department.